The Ergonomic Toothbrush

I came across this picture of an ergonomic toothbrush which seems quite interesting. (I have provided a picture - - compliments of http://www.baddesigns.com/toothbr3.html ) There are two types of the toothbrush (one for right-handed people and one for left-handed people). I was amazed at how this design doesn't take into account that we rotate our toothbrushes depending on what side of our mouths we are brushing! Therefore, if you are left-handed it feels natural to brush the right side of our mouth, but NOT the left... and vice versa for the right-handed person.

I can't imagine owning this toothbrush (it certainly wouldn't fit in a toothbrush holder!). Thoughts??